Add readonly flag to cli

cmd/root.go

@@ -113,6 +113,10 @@ func loadConfiguration() *config.Config {
 		k9sCfg.K9s.OverrideHeadless(*k9sFlags.Headless)
 	}
 
+	if k9sFlags.ReadOnly != nil {
+		k9sCfg.K9s.OverrideReadOnly(*k9sFlags.ReadOnly)
+	}
+
 	if k9sFlags.Command != nil {
 		k9sCfg.K9s.OverrideCommand(*k9sFlags.Command)
 	}
@@ -189,6 +193,12 @@ func initK9sFlags() {
 		config.DefaultCommand,
 		"Specify the default command to view when the application launches",
 	)
+	rootCmd.Flags().BoolVar(
+		k9sFlags.ReadOnly,
+		"readonly",
+		false,
+		"Disable all commands that modify the cluster",
+	)
 }
 
 func initK8sFlags() {

internal/config/flags.go

@@ -18,6 +18,7 @@ type Flags struct {
 	Headless      *bool
 	Command       *string
 	AllNamespaces *bool
+	ReadOnly      *bool
 }
 
 // NewFlags returns new configuration flags.
@@ -28,6 +29,7 @@ func NewFlags() *Flags {
 		Headless:      boolPtr(false),
 		Command:       strPtr(DefaultCommand),
 		AllNamespaces: boolPtr(false),
+		ReadOnly:      boolPtr(false),
 	}
 }